Idaho Traffic Signals practice test

Practice lights, arrows and pedestrian signals: 21 questions based on the Idaho Driver's Handbook, 12 of them on Idaho's own rules.

Key Idaho facts: Traffic Signals

Sample Traffic Signals questions

What does a flashing yellow arrow allow?

  • A turn only after you come to a full stop
  • A protected turn while oncoming traffic is stopped
  • A turn after yielding to oncoming traffic and pedestrians
  • No turns at all until the arrow is green
Show the answer

A turn after yielding to oncoming traffic and pedestrians

Oncoming vehicles and pedestrians in crosswalks go first.

Source: Idaho Driver's Handbook, Traffic Signals, Flashing Yellow Arrow, PDF p. 56

In a doghouse-shaped signal, what does a yellow arrow light tell you?

  • Oncoming traffic must now stop
  • Left turns are not allowed now
  • The protected left turn is ending
  • The signal is not working right
Show the answer

The protected left turn is ending

Doghouse signals usually control protected left turns.

Source: Idaho Driver's Handbook, Traffic Signals, Doghouse Signal, PDF p. 56

There is no stop line or crosswalk at an intersection with a stop sign. Where do you stop?

  • In the middle of the intersection itself
  • About ten feet past the stop sign
  • Where you can see cross traffic before entering
  • Anywhere you like, as long as it is near the sign
Show the answer

Where you can see cross traffic before entering

With a stop line, stop at the line; with a crosswalk, stop before it.

Source: Idaho Driver's Handbook, Traffic Signs, Stop, PDF p. 44; Stopping, PDF p. 69

A steady yellow light appears and you can stop safely before the intersection. What should you do?

  • Keep going at the same speed
  • Honk and proceed
  • Speed up to beat the red
  • Stop before the intersection
Show the answer

Stop before the intersection

If you are already in the intersection, continue and clear it.

Source: Idaho Driver's Handbook, Traffic Signals, PDF p. 55

A pedestrian hybrid beacon shows alternating flashing red lights. What must you do?

  • Stop, yield to pedestrians, then go when clear
  • Go ahead, since flashing red means caution
  • Stay stopped until the beacon goes dark
  • Slow down but keep moving without stopping
Show the answer

Stop, yield to pedestrians, then go when clear

The beacon is dark except when a pedestrian activates it.

Source: Idaho Driver's Handbook, Pedestrian Crossings, PDF pp. 56-57

What does a steady red arrow mean?

  • No turn in that direction until it changes
  • Turn after coming to a full stop first
  • Turn if no traffic or pedestrians are coming
  • The turn lane is closed for the day
Show the answer

No turn in that direction until it changes

Wait for a green or yellow indication before turning.

Source: Idaho Driver's Handbook, Traffic Signals, PDF p. 55; Stopping, PDF p. 69

What does a red-and-white barricade show, compared with an orange-and-white one?

  • It is temporary
  • It can be ignored at night
  • It marks a detour for trucks only
  • It is permanent
Show the answer

It is permanent

Both colors give drivers the same instructions.

Source: Idaho Driver's Handbook, Barricades, PDF p. 54

Your light is green, but traffic ahead would leave you stuck in the intersection. What must you do?

  • Go around the stopped traffic ahead
  • Pull into the crosswalk
  • Wait until there is room to clear it
  • Go ahead, because your light is green
Show the answer

Wait until there is room to clear it

Idaho law forbids entering without space on the far side.

Source: Idaho Code, Idaho Code 49-614; Traffic Signals, Green Circular Light, PDF p. 56

Take this topic's test

More Idaho practice

About these questions

We wrote these practice questions from the facts in the Idaho Driver's Handbook (Idaho Driver's Handbook, July 2026 edition (cover dated JULY 2026; driver_manual.pdf in ITD's 2026/04 uploads, 139 PDF pages, form number 01-9530906 on the back cover), the handbook linked from ITD's 'Taking the Driver's Test' guide, read 2026-11-10. The older upload path (wp-content/uploads/2016/06/driver_manual.pdf) served a byte-identical file on 2026-11-10. Page numbers cited are PDF pages, which equal the printed page numbers. PDF page 67 (highway map) and the sign illustrations have no text and were not used. Page 2 states that the handbook paraphrases Idaho statutes and that courts follow the statutes, so every legal rule used in questions was checked against the Idaho Code on legislature.idaho.gov (Title 49, Title 18 chapter 80 and 23-505, read 2026-11-10, with the 2026 amendment history shown on each section). Questions follow the statute. Out-of-date or inconsistent handbook statements and how they were handled: (1) Cell phones (PDF pp. 92-93) describe only a ban on reading, writing or sending text messages, with no points and a moving violation only for commercial drivers. Since July 1, 2020 (fines from January 1, 2021) Idaho Code 49-1401A bans operating a motor vehicle while using any mobile electronic device, including while stopped in traffic, except hands-free or voice use with one touch, emergency calls and hands-free navigation; it is a moving infraction ($75, $150 for a second within three years, $300 after that), three convictions in three years allow a court suspension up to 90 days, a first conviction carries no points, and it is a primary offense. Questions follow the statute; no question uses the handbook's texting-only description. (2) Signal timing: PDF p. 72 says five seconds 'on freeways or highways' and PDF p. 87 'five seconds or 100 feet'; Idaho Code 49-808(2) requires five seconds on controlled-access highways and when leaving a parked position, and the last 100 feet in all other cases. Questions use the statute (100 feet on city streets, five seconds on freeways); signal_before_turn_ft is 100. (3) High-beam dimming: PDF p. 43 says dim 200 feet before overtaking; Idaho Code 49-923(3) requires low beams when following within 200 feet except while actually overtaking and passing. Questions and dim_following_ft use the statute's wording. (4) School bus: PDF p. 70 says opposing traffic need not stop on highways with four or more lanes and two lanes in each direction; Idaho Code 49-1422(1) exempts oncoming traffic on a highway of more than three lanes. The question uses the statute. (5) Passing speed exception (PDF p. 77) covers only two-lane roads; 2026 amendments to Idaho Code 49-654(2)(b) also allow it in passing lanes posted 55 mph or more outside cities. The question is limited to the two-lane case, which both state. (6) Freeway speeds: PDF pp. 83 and 85 say up to 80 mph on rural and 65 mph on urban interstates; Idaho Code 49-654(2)(a) sets 75 mph on interstates unless posted (80 after a study) and 35 mph in urban districts unless posted. Questions use the statute's defaults (PDF p. 68 matches it). (7) Skills test order: PDF p. 33 says the knowledge and skills tests may be taken in either order, while ITD's 'Taking the Driver's Test' page says the knowledge test must be passed first except by applicants under 17 on a supervised instruction permit; not tested. (8) The handbook's bicycle passing distance of at least three feet (PDF pp. 98, 101) is advice; Idaho Code 49-632(1) requires only a safe distance, so bicycle_pass_ft is left open and the one question on it asks what the handbook recommends. (9) Seat belts (PDF p. 41: all occupants) are limited by Idaho Code 49-673 to vehicles up to 8,000 pounds, with secondary enforcement and a $10 fine; the question reflects the statute. Insurance minimums (25/50/15) are not in the handbook and come from Idaho Code 49-117(20) and 49-1229. DUI, test refusal and administrative suspension penalties (PDF pp. 125-127, 131-132), crash reporting over $1,500 (PDF pp. 119, 121), parking distances (PDF p. 81), railroad stopping distance (PDF p. 60), move-over (PDF p. 95), the GDL rules (PDF pp. 15-19) and GDL penalties (PDF p. 125) match the current statutes. edition) and from official sources on road signs. Every answer links to its source, so you can check it and read more.

DMV Decoded is an independent guide, not a government agency. This practice test is not connected to the Idaho Transportation Department, Division of Motor Vehicles, and your actual test will have different questions. Study the handbook, and check the agency's website for current rules.